Indicating and control device



N0V- 5, 1935- w. E. NEWMAN 2,019,925 I lINDICATING AND CONTROL DEVICE Filed Dec. 29, 1954 Patented Nov. s, 193s PATENT OFFICE IDICATING AND CONTROL DEVICE William E. Newman, Moorestown, N. J., assigner to Radio Corporation of America, a corporation i 'of Delaware ApplicationDecember Z9, 1934,` Serial N0. 759,747

cating and control devices.

One of the objects of my invention is to provide an improved indicating and control device adapted particularly for use in all-wave radio receivers to adjust the same for reception on selected bands over a predetermined frequency range, and to provide means for indicating the particular band for which the receiver is adjusted as well as the particular frequency or station in such band to which the receiver is tuned.

Another object of my invention is to provide an improved indicating andcontrol device of the 18 character referred to which is relatively simple in construction and reliable in operation, and which can be constructed as a unit and applied readily to a radio receiver of conventional design.

Other objects and advantages will hereinafter 2o appear.

In accordance with my invention, apointer is supported intermediate its ends for rotation about an axis through the `center of a dial. The dial is provided with scales disposed on circles about the center and at different distances radially therefrom, each scale being for a different band over the entire frequency range. connected for rotation with the shaft of the tuning condenserto indicate the station or wave length to which the receiver is tuned. An indicating'element, mechanically connected to a control shaft for actuating a wave-change switch, assumes different positions with respectto the dial in accordance with the position of this switch 85 to indicate which scale on the dial is to be read for any particular'setting of the receiver. Provision is made for uniform illumination of the entire dial, and the casting of a shadow on the face thereof to indicate which scaleis to be read.

My invention resides in `the improved construction of the character hereinafter described and claimed..

For the purpose of illustrating my invention an embodiment thereof is shown in the drawing, wherein Figure 1 is a lfront elevational view, partly broken away and partly in section, of an indicating and control device constructed and operating in accordance with my invention; and

Si Fig. 2 is a sectional view, partly diagrammatic, the section being taken on the line 2--2 in Fig. l.

In the drawing, the reference numeral IIJ designates a pointer Lfixed intermediate its ends to a spindle I2 extending through the center of a` i dial I4. The spindlel2 is xed by a set screw 'I'he pointer is (Cl. 11G-124.1)

I6 to the shaft I8 of a'tuning condenser 20 of conventional design.

The dial I4 is translucent and is provided with scales such as A, B, C and D, disposed as shown on arcs of circles about the center of the dial 5 and on opposite sides of the center. These scales are used, respectively, in tuning over the different bands of the entire frequency range.

For the purpose of adjusting the receiver for operation over a particular band, a knob` 22 is l0 turned-to rotate a shaft 24, whereby a wavechange switch 26 ofconventional design is moved to any one of its positions I, 2, 3 and 4.

.Provision is made, for indicating to the operator the particular scale on dial I4 to be read, l5 by means of an indicating element 28 extending upwardly through an opening 30 in the casing 32 which supports the dial I4. The element 28 is moved linearly upon rotation of the shaft 24 by meansof armechanical connection with the 20 latter comprising a sprocket wheel 32 fixed to the shaft and meshing with a rack 34 at the lower end of the indicating element.

Discs 36 on opposite sides of the sprocket wheel 32 extend outwardly beyond the same andoperate 25 to hold the rack 34 and the sprocket wheel in mesh, and are spaced lsuiliciently to permit free sliding movement between the rack and the adjacent faces of` these discs. 'I'he element 28 is provided with a slot 38 which receives a stud 30 40 for the purpose of guiding the element at its upper end. l,

The element 28 is provided with indicating parts 42 and 44 spaced along the same and disposed for registration, respectively, with the scales 36 on opposite sides of the center of the dial.

The dial I4 is made opaque at its central portion 46 over a circle having a diameter somewhat less than the distance between the indicating parts 42 and 44. 40 The entire face o f the dial I4 is illuminated uniformly by light from lamps 48 which is reected from reiiectors 50 and then from the inside surface 52 of the base of the casing 32.

The condenser `shaft I8 is rotated by turning 45 a knob 54 to rotate a shaft 56 mechanically connected to the condenser shaft through a reduction device 58 of conventional design.

In operation, with the wave-change switch 26 in position No. 1, as represented in Fig. 2, the posi- 50 tion of the indicating element 28 is such as to place the indicating part 44 so that it casts its own shadow on the dial, adjacent the 'scale D, as shown in Fig. 1. In this position of the element 28.theindicatingpart42ismaskedoior obscured from view by the opaque portion 46 of the dial. The receiver is then adjusted for receptim over the bandted by the scale D, and the shadow of the indicating part Il, 'adjacent the scale D, indicates to the operator thatitisthisscalewhichistobereadasthe knob 54 is turned in tuning.

As the wave-change switch is moved to position No. 2, the element 2l is raised to cause the indicatingpartll tocastitsshadow adjacentthe scale C, thereby indicating to the operator that the receiver has been adjfed for reception over the band represented by this scale. In this position of the element 2l, the indicating part I! is stillmaskedoiforobscuredfmmviewbythc opaque portion of the dial.

As the wave-change switch is moved to positions Nos. 3-and 4, the element 2l is raised so that the indicating part l2 casts its shadow, iirst adjacent the scale B, and then adjacent the scale A, to provide the proper indication as to which band the receiver is adjusted for. In these positions of the element 2l, the indicating par't Il is masked on or obscured from view by the opaque portion 46 of the dial.

From the foregoing it will be seen that I have provided an improved indicating and control apparatus for 'all-wave radio receivers embodying a full-vision, illuminated dial provided with diii'erent scales for the respective bands, and in which -there are means actuated upon adjustment of the wave-change switch to indicate to the operator which one of the scales is to be read.

Although but one embodiment of my invention has been described, it will be understood that various modiiications within the conception of those skilled in the art are pomble without departing from the spirit of my invention or the scope of the claims.

I claim as my invention:

1. An indicating and control device comprising a dial provided with a plurality of scales in spaced relation with respect to each other, an indicating pointer associated with said dial and common with respect to said scales, a separate indicating element supported for movement transversely of said scales to selected positions adjacent the individual scales, a first control member moveable to different control positions in number the same as the number of said scales, connecting means between said member and said separate indicating element whereby the latter is moved to its respective indicating positions adjacent the individual scales when said member is moved to the respective and corresponding control positions thereof, and a second control member for eecting movement of said pointer about said dial independently of said indicating element.

2. An indicating and control device comprising a dial provided with a pluralityl of scales disposed respectively on arcs of circles about a common center, an indicating pointer common with respect to said scales and rotatable about said center, a separate indicating element supported for movement transversely ot said scales to selected positions adjacent the individual scales, a first control member moveable to different control positions in number the same as the number of said scales, connecting means between said member and said separate indicating element whereby the latter is moved to its respective indicating positions adjacent the individual scales when saidV member is moved to the respective and corresponding control positions thereof, and a second control member for rotating said pointer for movement thereof across said scales and independently of said separate indicating element.

3. An indicating and control device for multirange radio apparatus comprising a dial provided withscalesonarcsorcirclesabouta 5 common center and on opposite sides of the center, each of said scales representing one frequency range of said apparatus an indicating pointer associated with said dial and supported intermediate its ends for rotation about said center, a separate 10 indicating element supported for mov transversely of said scales to selected positions adjacent the individual scales, a first control member moveable to diiferent control positions in numberthesame astbenumber of saidscales,15 connecting means between said member and said separate indicating element whereby the latter is moved to its respective indicating positiom adjacent the individual scales when said member is moved to the respective and corresponding conzo trol pomtions thereof, and a second control member for rotating said pointer for movement thereof across said scales and independently of said separate indicating element.

4. An indicating and control device compris- `provided with two indicating parts spaced along said element and disposed for-registration respectively with said scales to indicate which one ofthelatteristobcreadmeansformaskingoi! from view either. of said indicating parts when the other is in position to be effective, a first control member movable to different control posi- 405 tionsinnmnberthesameasthe numberoisaiclA scales, connecting means between said member and said element for operating the later to place said parts in their respective indicating positions adjacent the individual scales when said member' 45 is moved to the respective and cor-responding control positions thereof, and a second control member for effecting relative movement of said dial and pointer: with respect to each other and independently of said element.

5.' An indicating and control device comprising adialprovidedwithscalesdisposedonaresof circles about a common center and on opposite sides of the center, an indicating pointer associated with said dial and supported intermediate its ends for rotation about said center, an element supported for movement transversely of said scales and provided with two indicating parts spaced along said element and disposed for registration respectively with the scales on opposite is moved to the respective and corresponding control positions thereof, and a. second control member for rotating said pointer for movement thereof across said scales and independently of said-element.

6. In combination, a dial provided with a plurality of scales, a pointer common to said scales, meansl for moving said pointer about said scales, an indicatingr element disposed adjacent said dial and supported for movement into registration with the individual scales to designate which one of the same is to be read, and means independent of said pointer moving means for moving said indicating element.

'1. In combination. a dial provided witha plurality ot'scales, indicatingelements disposed adjacent said dial and supported for movement'into Registration with the individual scales to designate which one of the same is to be read, means lfor moving said elements, and means for masking of! from view one of said elements when another is in position to be effective.

s. In combination, n dini provided witha plumined by the extent and manner of such move- 10 ment. 

